code: def handler(event, context):
      """Lambda handler"""
      ThreatStream(
          context.invoked_function_arn,
          context.get_remaining_time_in_millis,
      ).runner(event)
  
imports: from datetime import datetime, timedelta
  import json
  import backoff
  import boto3
  from botocore.exceptions import ClientError
  import requests
  from streamalert.shared.backoff_handlers import backoff_handler, success_handler, giveup_handler
  from streamalert.shared.config import load_config, parse_lambda_arn
  from streamalert.shared.logger import get_logger
  from streamalert.threat_intel_downloader.exceptions import ThreatStreamCredsError, ThreatStreamLambdaInvokeError, ThreatStreamRequestsError
label_desc: Use image node_id 1 for calling a global function with example usage: handler(event, context) without return types